SIST EN 2446:2009

Aerospace series - Steel FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Bars - De ≤ 25 mm

This standard specifies the requirements relating to:
Steel FE-PL1503 (35CrMo4)
1 100 MPa ≤ Rm ≤ 1 300 MPa
Bars
De  25 mm
for aerospace applications.

Luft- und Raumfahrt - Stahl FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Stangen - De ≤ 25 mm

Série aérospatiale - Acier FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Barres - De ≤ 25 mm

Aeronavtika - Jeklo FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Palice - De ≤ 25 mm

General Information

• Status: Published
• Publication Date: 04-Dec-2008
• ICS: 49.025.10 - Steels
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Dec-2008
• Due Date: 06-Feb-2009
• Completion Date: 05-Dec-2008
• Ref Project: EN 2446:2008 - Aerospace series - Steel FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Bars - De ≤ 25 mm

Relations

• Refers: SIST EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: SIST EN 4258:2024 - Aerospace series - Metallic materials - General organization of standardization - Link between types of European Standards and their use
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 7010:2020 - Aerospace series - Configuration - Definition and designation for product standards for externally threaded fasteners
• Effective Date: 28-Jan-2026

Overview

SIST EN 2446:2009 is a European standard developed by CEN for the aerospace industry. It specifies the requirements for steel grade FE-PL1503 (35CrMo4) in the form of bars with a maximum nominal diameter (De) of 25 mm and an ultimate tensile strength (Rm) between 1,100 MPa and 1,300 MPa. This standard ensures that manufacturers and suppliers can consistently produce and procure steel bars that meet rigorous quality and performance demands for aerospace applications.

Key Topics

• Steel Grade and Designation: Focuses on FE-PL1503 (equivalent to 35CrMo4), a low alloy chromium-molybdenum steel known for its combination of strength, toughness, and hardenability.
• Product Forms and Dimensions: Applies to steel bars with diameters up to 25 mm, which are commonly used in aircraft structures and components.
• Mechanical Properties: Specifies a tensile strength range of 1,100 MPa to 1,300 MPa, with minimum elongation requirements, proof stress, and impact strength levels suitable for demanding environments.
• Delivery Conditions and Heat Treatment: Details acceptable delivery conditions, including softened, hardened, and tempered states. Heat treatment regimes are provided to achieve specified mechanical performance.
• Testing and Inspection: Refers to applicable testing methodologies and inspection requirements to ensure compliance, such as sampling, dimensional checks, and hardness testing, in accordance with referenced standards.
• Marking and Traceability: Ensures that bars are correctly marked and production is traceable, supporting quality management and safety in aerospace supply chains.

Applications

SIST EN 2446:2009 steel bars are vital in aerospace manufacturing, where strict material consistency and mechanical performance are mandatory. Typical uses include:

• Landing gear components
• Aircraft structural parts
• Machined fasteners and connecting rods
• Actuation and control system parts
• General purpose high-strength applications within the aerospace sector

The standard helps aerospace engineers, designers, and procurement specialists specify materials with confidence, reducing risk in critical applications where reliability and durability matter most.

Related Standards

SIST EN 2446:2009 is part of a broader suite of European aerospace standards that work together to secure high-quality metallic materials across the industry. Key related standards include:

• EN 4258: Organizational framework for standardizing metallic materials in aerospace.
• EN 4500-5: Details rules for drafting and presenting material standards, with a focus on steels.
• EN 4700-2: Technical specification for wrought steel bars and sections, defining requirements for their manufacture and supply.
• EN 9133: Outlines quality management systems and qualification procedures for aerospace parts.

Using SIST EN 2446:2009 in concert with these standards supports material compliance, safety, and international competitiveness for aerospace manufacturers and suppliers.

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Keywords: SIST EN 2446:2009, 35CrMo4, FE-PL1503, aerospace steel bars, CEN, high-strength steel, metallic materials, aerospace standard, mechanical properties, steel bar quality, traceability in aerospace, steel for aircraft components, European standard, EN 4258, EN 4500-5, EN 4700-2, EN 9133.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.49.025.10JeklaSteelsICS:Ta slovenski standard je istoveten z:EN 2446:2008SIST EN 2446:2009en01-januar-2009SIST EN 2446:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2446
November 2008 ICS 49.025.10 English Version
Aerospace series - Steel FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Bars - De ≤ 25 mm
Série aérospatiale - Acier FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Barres - De ≤ 25 mm
Luft- und Raumfahrt - Stahl FE-PL1503 (35CrMo4) - 1 100 MPa ≤ Rm ≤ 1 300 MPa - Stangen - De ≤ 25 mm This European Standard was approved by CEN on 24 August 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2446:2008: ESIST EN 2446:2009

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